IBM Support

IC64613: NULLPOINTEREXCEPTION RECEIVED WHEN THE JAVA CLIENT HAS DISCOVERED THAT THE TCP CONNECTION TO THE WMQ SERVER IS BROKEN

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • A NullPointerException occurs when the Java client has
    discovered that the TCP connection to the WebSphere MQ server
    has been broken while running in an synchronous MQGET mode of
    operation.
    
    The following stack trace is seen:
    
    java.lang.NullPointerException
    at
    com.ibm.mq.jmqi.remote.internal.RemoteHconn.exchangeTSH
    (RemoteHconn.java :1444)
    at
    com.ibm.mq.jmqi.remote.internal.system.RemoteProxyQueue.requestM
    essages(RemoteProxyQueue.java:1047)
    at
    com.ibm.mq.jmqi.remote.internal.system.RemoteProxyQueue.flushQue
    ue(RemoteProxyQueue.java:1880)
    at
    com.ibm.mq.jmqi.remote.internal.system.RemoteProxyQueue.proxyMQG
    ET(RemoteProxyQueue.java:2664)
    at
    com.ibm.mq.jmqi.remote.internal.RemoteFAP.jmqiGetMessageWithProp
    s(Remote  FAP.java:7198)
    at
    com.ibm.mq.jmqi.remote.internal.RemoteFAP.MQGET(RemoteFAP.java:7
    044)
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of WebSphere MQ v7 who are using Java
    clients to connect in CLIENT mode to a WebSphere MQ Queue
    Manager, including users of WebSphere MQ File Transfer Edition.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows) +Java
    ****************************************************************
    PROBLEM SUMMARY:
    Internally the Java client has two modes of operation when
    requesting messages, synchronous or asynchronous mode.
    
    When a disconnection between the client and server is detected,
    any asynchronous users are required to be informed of the event.
    However, when operating in the pure synchronous mode there was
    no mechanism instantiated by which to inform any asynchronous
    users.  Thus when the attempt was made to invoke this mechanism,
    a NullPointerException was thrown by the Java Virtual Machine.
    

Problem conclusion

  • A code change was made so that the asynchronous user
    disconnection detection mechanism is not invoked when operating
    in the synchronous mode, so the NullPointerException is no
    longer thrown.
    
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.2
    --------           --------------------
    Windows            U200316
    AIX                U829807
    HP-UX (PA-RISC)    U829678
    HP-UX (Itanium)    U829681
    Solaris (SPARC)    U829806
    Solaris (x86-64)   U829680
    iSeries            tbc_p700_0_1_2
    Linux (x86)        U829677
    Linux (x86-64)     U829676
    Linux (zSeries)    U829682
    Linux (Power)      U829679
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available, information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC64613

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-11-17

  • Closed date

    2009-11-30

  • Last modified date

    2009-11-30

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WMQ WINDOWS V7

  • Fixed component ID

    5724H7220

Applicable component levels

  • R700 PSY

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ63","label":"APAR \/ Maintenance"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
30 November 2009